[BREAK] update LivechatPriority data representation at disk, adds individual priority PUT

[cauefcr]

Proposed changes (including videos or screenshots)

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Further comments

OC-299

[codecov[bot]]

Codecov Report

Merging #27323 (ad49542) into feature/omnichannel-priorities (3efcafe) will decrease coverage by 0.05%. The diff coverage is n/a.

@@                        Coverage Diff                         @@
##           feature/omnichannel-priorities   #27323      +/-   ##
==================================================================
- Coverage                           42.16%   42.11%   -0.06%     
==================================================================
  Files                                 819      819              
  Lines                               17863    17863              
  Branches                             2026     2026              
==================================================================
- Hits                                 7532     7523       -9     
- Misses                              10047    10055       +8     
- Partials                              284      285       +1     

Flag	Coverage Δ
e2e	42.11% <ø> (-0.06%)	:arrow_down:

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[lgtm-com[bot]]

This pull request introduces 1 alert when merging f8de2af2668f4bf2aafee5243a8e4115ee6e30d6 into f4cd275c6a63c0fb85481f902932570cb6adb792 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

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